tuple_size.fail.cpp (984B)
1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // UNSUPPORTED: c++98, c++03 11 12 // <tuple> 13 14 // template <class... Types> 15 // class tuple_size<tuple<Types...>> 16 // : public integral_constant<size_t, sizeof...(Types)> { }; 17 18 // Expect failures with a reference type, pointer type, and a non-tuple type. 19 20 #include <tuple> 21 22 int main() 23 { 24 (void)std::tuple_size<std::tuple<> &>::value; // expected-error {{implicit instantiation of undefined template}} 25 (void)std::tuple_size<int>::value; // expected-error {{implicit instantiation of undefined template}} 26 (void)std::tuple_size<std::tuple<>*>::value; // expected-error {{implicit instantiation of undefined template}} 27 }